14-Letter Words Matching ___S_I________

There are 20 14-letter words that match ___S_I________. 8 are common words, such as CLASSIFICATION and CONSCIENCELESS. A rarer one is WORSHIPFULNESS. In this set, T is the most frequent open letter (17 words). 8 words contain a doubled letter.

Full list 20

classificationconsciencelessconspiratorialconstituenciesconstitutionalirascibilitiesperspicacitiesquestionnairesclassificatoryconstitutivelykarstificationprestidigitateclassicalitiesconspirationalgraspingnessesplasticizationsubstitutionalsubstitutivelytrustingnessesworshipfulness

About this list

Words
20 (8 common words)
Common example
classification
Rare example
worshipfulness
Doubled letters
8
Ending in S
9
Most frequent letter
T (17)

Questions

How many 14-letter words matching ___s_i________ are there?

20. 8 of them are common words.

What is a common example?

CLASSIFICATION is among the common words in this set.